Joint-lock



A. F. MILLER.

JOINT LOCK.

APPLICATION FILED JAN. 14. 1920.

1 376 150, Patented Apr. 26, 1921.

INVE/VTOR Mm.- g @M/M F/WM [74M ATTORNEY ALBERT F. MILLER, OF KANSAS CITY, KANSAS.

JOINT-LOCK.

reverse.

Specification of Letters Patent.

Patented Apr. 26, 19211.

Application filed January 14, 1920. Serial No. 351,421.

To all whom it may c0ncem.

Be it known that I, ALBERT F. MILLER, a citizen of the United States, residing at Kansas City in the county of Wyandotte and State of liansas, have invented a certain new and useful Improvement in J oint- Locks, of which the following is a specification. My invention relates to improvements in joint locks, and is particularly well adapted to be used in grille-work and Similar constructions, for the purpose of connecting bars with the rails.

The object of my invention is to provide a simple, cheap and efficient joint lock of the land described, which will eliminate the use of rivets or screws, which has great strength and durability,which can be easily and quickly assembled or disassembled,

respectively near the end of the bar two transverse grooves 6, Fig. 4.

The other member of the rail comprises a locking member 7 preferably tubular, which in one side is provided with a raised longitudinal portion 8. The locking member 7 is slidably fitted inthe member 1, and when so fitted, the raised portion 8 fills and closes the slot 2. The outer surface of the raised portion 8 is preferably flush with the outer surface of the member 1.

The side "of the locking member 7, which is opposite to the raised portion 8 is provided with two longitudinal and preferably inwardly extending spaced apart flanges 9 which are respectively adapted to slidably fit in the grooves 6, of the bars 1, thereby lockingly engaging the'said bars so as to firmly hold them in their proper positions in and which presents a neat and finished ap the tubular member 1. 4 pearance.

A further object of my invention is to provide a novel interlocking railcomprising two members telescopically engaging each other and having means when so engaged for lockingly holding the ends of bars.

A further object of my invention is to provide two members of a rail of the kind described which may be made by drawing sheet metal into the proper forms.

The novel features of my invention are hereinafter fully described and claimed.

In the accompanying drawing, which illustrates the preferred embodiment of my invention,

Figure 1 is a cross section of my improved jpint lock showing the rail engaged with a Fig. 2 is an enlarged perspective view of the outer tubular member. of the rail having perforations for receiving the bars.

1g. 3 is an enlarged perspective view of the inner locking member of the rail,

Fig. 4 is an enlarged perspective view of oneend of one of the bars.

Fig. 5 is a perspective view of grille-work embodying my improvement.

Similar reference characters designate similar parts in the different views.

1 designates the outer tubular member of the rail which in one side is provided with a longitudinal slot 2, the opposite side being adapted to have in it perforations 3 adapted to receive therein bars 4, each end of each of which is provided with a head 5, preferably formed by providing in opposite sides In adapting the member 1 for any particular use, the perforations 3 are punched therein in sizes to fit the particular bars 4 which are to be used, the perforations being spaced to correspond with the distance between the bars. The slot 2 in the member 1 is provided for the purpose of enabling the perforations 3 to be readily punched. The members 1 and 7 may be rolled or drawn from sheet metal and may be separately made and sold for stock purposes. In such cases, the user of the members may punch the perforations 3 in the member 1 to suit his particular requirements.

In assembling the rails with the bars 4, the bars are inserted through the perforations 3 following which the locking member 7 is slipped into the member 1 with the flanges 9 extending through the grooves 6 of thebars. When this has been done, the bars will be rigidly locked to the rails.

I do not limit my invention to the structure shown and described, as many modifications, within the scope of the appended claims, may be made without departing from the spirit of my invention. v

What I claim is 1. In a joint lock of the kind described, an outer tubular member having in one side a longitudinal slot, openings in the opposite side to receive a separate member, and slid able means within the tubular member for engaging and locking said separate member in position, substantially as set forth.

2. In a joint lock of the kind described, an outer tubular member having in one side 3. In a joint lock of the kind described,

an outer tubular member having in oneside a perforation, and in the other side a lon-.

gitudinal slot, a bar extending through said.

perforation and having at its inner end a head, and a locking member slidably fitted in the tubular member and having a longitudinal flange lockingly engaging said head.

4. In a joint lock of the kind described, an outer tubular member having in one side a'perforation, and in theother side a longitudinal slot, a bar extending through said perforation and having at its inner end a head, and a locking member slidably fitted in the tubular member and having in one side two spaced apart longitudinal flanges adapted to engage said head at opposite sides respectively of said bar.

5. In a joint lock of the kind described, an outer tubular member having in one side a perforation, and in the opposite side a lonhaving a longitudinal flange lockingly engaging said head.

6. In a joint lock of the kind described, an outer tubular member having in one side a perforation, and in the opposite side a longitudinal slot, a bar extendlng through said perforation having at its inner end a head, and a locking member slidably fitted in the tubular member and having one side closing said slot and provided in its opposite side with two spaced apart longitudinal flanges adapted to engage said head at opposite sides respectively of said bar. I

7. In a joint lock of the kind described, an outer tubular member having in one side a perforation, and in the opposite side a longitudinal slot, a bar extending through said perforation having atransverse groove, and a locking member slidably fitted in the tubular member and said groove.

8. In a joint lock of the kind described, an outer tubular member having in one side a perforation, and in the opposite side a longitudinal slot, a bar extending through said perforation having a transverse groove, and a locking member slidably fitted in the tubular member and groove and closing said slot. I 9. In a joint lock of the kind described, an outer tubular member having in one side a perforation and in the opposite side a longitudinal slot, a bar extending through said perforation having two grooves in opposite sides respectively, and a locking member slidably fitted in the tubular memher and said grooves and closing said slot.

10. In a joint lock of the kind described, an outer tubular member having in one side a perforation and in the opposite side 'a lonnal side with two longitudinal flanges re- I spectively slidably fitted in said grooves.

In testimony whereof I have signed my name to this specification.

' ALBERT' F. MILLER. 

